{"id":6121,"date":"2022-06-25T18:36:19","date_gmt":"2022-06-25T09:36:19","guid":{"rendered":"http:\/\/ftz.myds.me\/wordpress\/?p=6121"},"modified":"2023-01-07T20:09:16","modified_gmt":"2023-01-07T11:09:16","slug":"%eb%b3%80%ec%a0%84%ec%86%8c-%ec%a0%91%ec%a7%80%ec%84%a4%ea%b3%84","status":"publish","type":"post","link":"http:\/\/ftz.myds.me\/wordpress\/%eb%b3%80%ec%a0%84%ec%86%8c-%ec%a0%91%ec%a7%80%ec%84%a4%ea%b3%84\/","title":{"rendered":"\ubcc0\uc804\uc18c \uc811\uc9c0\uc124\uacc4\u2055"},"content":{"rendered":"\n<p><a href=\"http:\/\/ftz.myds.me\/wordpress\/iec-%ec%a0%91%ec%a7%80%ec%84%a4%ea%b3%84\/\" target=\"_blank\" rel=\"noreferrer noopener\">IEC \uc811\ube44\uc124\uacc4<\/a>\u2736<\/p>\n\n\n\n<p><strong>\ubcc0\uc804\uc18c \uc811\uc9c0\uc124\uacc4(ANSI\/IEEE std. 80)<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>ANSI\/IEEE std.80\uc5d0 \uc758\ud55c \uc811\uc9c0\uc124\uacc4 \ud750\ub984\ub3c4\ub97c \uc81c\uc2dc\ud558\uace0 \uc124\uba85\ud558\uc2dc\uc624.<\/p><\/blockquote>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"391\" height=\"200\" src=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1107\u1167\u11ab\u110c\u1165\u11ab\u1109\u1169-\u110c\u1165\u11b8\u110c\u1175\u1109\u1165\u11af\u1100\u1168.png\" alt=\"\" class=\"wp-image-10303\" srcset=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1107\u1167\u11ab\u110c\u1165\u11ab\u1109\u1169-\u110c\u1165\u11b8\u110c\u1175\u1109\u1165\u11af\u1100\u1168.png 391w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1107\u1167\u11ab\u110c\u1165\u11ab\u1109\u1169-\u110c\u1165\u11b8\u110c\u1175\u1109\u1165\u11af\u1100\u1168-300x153.png 300w\" sizes=\"(max-width: 391px) 100vw, 391px\" \/><figcaption>\ubcc0\uc804\uc18c \uc811\uc9c0\uc124\uacc4<\/figcaption><\/figure>\n\n\n\n<p>[Step 01] \ud1a0\uc591\uc758 \ud2b9\uc131 \ubd84\uc11d(\ud1a0\uc591\uc758 \uc800\ud56d\ub960 \ud3c9\uac00, \uc9c0\uce35\uad6c\uc870 \ub4f1 \ud655\uc778)\ub4f1 \ud604\uc7a5\uc870\uc0ac<\/p>\n\n\n\n<p>[Step 02] \ucd5c\ub300 \uc9c0\ub77d\uc804\ub958(\ube44\ub300\uce6d \uc804\ub958 \ud3ec\ud568) \uacc4\uc0b0<\/p>\n\n\n\n<p>[Step 03] \uc811\uc9c0\ub3c4\uccb4 \uad75\uae30 \uc120\uc815<\/p>\n\n\n\n<p>[Step 04] \ud5c8\uc6a9 \uc811\ucd09\uc804\uc555 \ubc0f \ubcf4\ud3ed\uc804\uc555 \uacc4\uc0b0(70Kg)<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[E_{step}=(1,000+6C_s\\cdot\\rho_s)\\times \\frac{0.157}{\\sqrt{t}}\\]\n\\[C_s:\ud45c\uba74\uce35\uc758] \ub450\uaed8\uc640\\ \ubc18\uc0ac\uacc4\uc218\uc5d0\\ \uc758\ud574\\ \uacb0\uc815\ub418\ub294 \\ \uacc4\uc218\\]\n\\[\\rho_s:\ud45c\uba74\uce35\uc758\\ \uc800\ud56d\ub960[\\Omega\\cdot m]\\]\\[t:\uc0ac\uace0\uc9c0\uc18d\uc2dc\uac04[s]\\]<script src='http:\/\/ftz.myds.me\/wordpress\/wp-includes\/js\/dist\/vendor\/regenerator-runtime.min.js?ver=0.13.9' id='regenerator-runtime-js'><\/script>\n<script src='http:\/\/ftz.myds.me\/wordpress\/wp-includes\/js\/dist\/vendor\/wp-polyfill.min.js?ver=3.15.0' id='wp-polyfill-js'><\/script>\n<script src='http:\/\/ftz.myds.me\/wordpress\/wp-includes\/js\/dist\/hooks.min.js?ver=4169d3cf8e8d95a3d6d5' id='wp-hooks-js'><\/script>\n<script src='http:\/\/ftz.myds.me\/wordpress\/wp-includes\/js\/dist\/i18n.min.js?ver=9e794f35a71bb98672ae' id='wp-i18n-js'><\/script>\n<script id='wp-i18n-js-after'>\nwp.i18n.setLocaleData( { 'text direction\\u0004ltr': [ 'ltr' ] } );\n<\/script>\n<script  async src='https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/mathjax\/2.7.7\/MathJax.js?config=TeX-MML-AM_CHTML' id='mathjax-js'><\/script>\n<\/div>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\ubc18\uc0ac\uacc4\uc218(K)=\\frac{\\rho-rho_s}{\\rho+\\rho_s}\\]\\[\\cdot\\cdot\\cdot[\\rho:\ub300\uc9c0\uc758 \uc800\ud56d\ub960,\\rho_s:\ud45c\uba74\uce35\uc758 \uc800\ud56d\ub960\\]\n\\[\uac10\uc18c\uacc4\uc218(C_s):\ud45c\uba74\uce35\uc758\\ \ub450\uaed8\uc640\\ \\]\\[\ubc18\uc0ac\uacc4\uc218\uc5d0\\ \uc758\ud574\\ \uacb0\uc815\ub418\ub294\\ \uac10\uc18c\uacc4\uc218\\]<\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"521\" height=\"342\" src=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1107\u1167\u11ab\u110c\u1165\u11ab\u1109\u1169-\u110c\u1165\u11b8\u110c\u1175\u1109\u1165\u11af\u1100\u11681.png\" alt=\"\" class=\"wp-image-10304\" srcset=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1107\u1167\u11ab\u110c\u1165\u11ab\u1109\u1169-\u110c\u1165\u11b8\u110c\u1175\u1109\u1165\u11af\u1100\u11681.png 521w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1107\u1167\u11ab\u110c\u1165\u11ab\u1109\u1169-\u110c\u1165\u11b8\u110c\u1175\u1109\u1165\u11af\u1100\u11681-300x197.png 300w\" sizes=\"(max-width: 521px) 100vw, 521px\" \/><\/figure>\n\n\n\n<p>[Step 05] \uc608\ube44\uc124\uacc4 \uc2e4\uc2dc<\/p>\n\n\n\n<p>Mesh \uc811\uc9c0\ud560 \uba74\uc801\uc744 \uace0\ub824\ud558\uc5ec, Mesh\uc758 \uac04\uaca9 \ubc0f 1\ubcc0 Mesh\uc758 \uc218, \ub9e4\uc124\uae4a\uc774 \ub4f1\uc744 \uac1c\ub7b5\uc801\uc73c\ub85c \uc815\ud55c\ub2e4.<\/p>\n\n\n\n<p>[Step 06] \uc811\uc9c0\uc800\ud56d \uc0b0\ucd9c<\/p>\n\n\n\n<p>\uc0b0\ucd9c \uacc4\uc0b0\uc2dd\uc774\ub098 \uae30\uc220\uc790\ub8cc \uadf8\ub798\ud504\ub97c \uc774\uc6a9\ud558\uc5ec \uc0b0\ucd9c\ud558\uc5ec, \ub300\uaddc\ubaa8 \ubcc0\uc804\uc18c: 1[\u03a9], \ud50c\ub79c\ud2b8\ub098 \uae30\ud0c0 \uc18c\uaddc\ubaa8 \uc7a5\uc18c: 1~5[\u03a9] \uc774\ud558\uac00 \ub418\ub3c4\ub85d \ud55c\ub2e4.<\/p>\n\n\n\n<p>1) \uc218\uc2dd \uc801\uc6a9<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[R_g=\\rho[\\frac {1}{L}+\\frac{1}{\\sqrt{20A}}(1+\\frac{1}{1+h\\sqrt{\\frac{20}{A}}})]\\]\\[\\cdot\\cdot\\cdot Scwarz\uc2dd\\]\n\\[\\rho : \ub300\uc9c0 \uc800\ud56d\ub960 [\\Omega \\cdot m]\\]\\[A:Mash \uba74\uc801[M^2]\\]\\[L:Mash\ub3c4\uccb4\uc758 \uae38\uc774[m]\\]\\[h:\ub9e4\uc124\uae4a\uc774[m]\\]<\/div>\n\n\n\n<p>2) \uae30\uc220\uc790\ub8cc \uadf8\ub798\ud504 \uc801\uc6a9<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[R_g=\\frac{\\rho\\times(\\alpha)}{1,000}\\]<\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"374\" height=\"405\" src=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u1162.png\" alt=\"\" class=\"wp-image-10305\" srcset=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u1162.png 374w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u1162-277x300.png 277w\" sizes=\"(max-width: 374px) 100vw, 374px\" \/><\/figure>\n\n\n\n<p>[Step 07] \ucd5c\ub300 \uc811\uc9c0\ub9dd \uc720\uc785\uc804\ub958 \uc0b0\ucd9c\ubd84\ub958 \u25b6 \ubd84\ub958\uacc4\uc218 \uace0\ub824<\/p>\n\n\n\n<p>1\uc120\uc9c0\ub77d\uc73c\ub85c \ubc1c\uc0dd\ud55c \uc9c0\ub77d\uc804\ub958\uac00 \uc811\uc9c0\ub97c \ud0c0\uace0 \uc720\uc785\ub420 \ub54c \uace0\uc7a5\uc804\ub958\uc758 \uc77c\uc815\ubd80\ubd84\ub9cc\uc774 \ubcc0\uc804\uc18c\uc758 \uc811\uc9c0\ub9dd\uc744 \ud1b5\ud558\uc5ec \ub300\uc9c0\ub85c \ubc29\ucd9c\ub418\uace0 \ub098\uba38\uc9c0\ub294 \uc5f0\uc811\uacfc \uac19\uc740 \uc774\uc720\ub85c \ub2e4\ub978 \uacbd\ub85c\ub97c \ud1b5\ud558\uc5ec \uc804\uc6d0\uc73c\ub85c \uadc0\ud658\ub418\ub294 \uac83\uc73c\ub85c\uc11c \uc811\uc9c0 \uc124\uacc4\uc2dc\uc5d0 \uc911\uc694\ud55c GPR(Ground Potential Rise)\uc758 \ud06c\uae30\ub97c \uacb0\uc815\ud558\ubbc0\ub85c \uc704\ud5d8\uc804\uc555 \uac80\ud1a0\uc2dc\uc5d0 \ub9e4\uc6b0 \uc911\uc694\ud55c \ubcc0\uc218\uc774\ub2e4. \ubd84\ub958\uacc4\uc218\ub294 0.4~0.6 \uc801\uc6a9<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"551\" height=\"282\" src=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u11623.png\" alt=\"\" class=\"wp-image-10306\" srcset=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u11623.png 551w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u11623-300x154.png 300w\" sizes=\"(max-width: 551px) 100vw, 551px\" \/><\/figure>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[I&#8217;_g=I_g\\times S_f\\times D_f\\]\n\\[I_g:\ucd5c\ub300\\ \uc9c0\ub77d\uc804\ub958,S_f:\ubd84\ub958\uacc4\uc218,D_f:\uac10\uc18c\uacc4\uc218(1.0)\\]<\/div>\n\n\n\n<p>[Step 08] \ub300\uc9c0\uc804\uc704 \uc0c1\uc2b9(GPR) \uacc4\uc0b0<\/p>\n\n\n\n<p>\ub300\uc9c0\uc804\uc704\uc0c1\uc2b9(GPR)\uc744 \uad6c\ud574\uc11c \uc774 \uac12\uc774 \ud5c8\uc6a9\uc811\ucd09\uc804\uc555\ubcf4\ub2e4 \ub0ae\uc73c\uba74 \ubd84\uc11d\uc744 \ub05d\ub0b8\ub2e4. \uadf8\ub807\uc9c0 \uc54a\uc73c\uba74 \ub2e4\uc74c Step\uc744 \uc9c4\ud589\ud55c\ub2e4.<br>GPR(Ground Potential Rise)\ub294 I&#8217;g x Rg\uc744 \ub9d0\ud558\uba70, \uc77c\ubc18\uc801\uc73c\ub85c 5,000V \uc774\ub0b4\ub85c \uace0\ub824\ud558\uace0 \uc788\uc73c\ub098, \uae30\uae30\uc808\uc5f0 \ub0b4\ub825 \ub4f1\uc744 \uace0\ub824\ud558\uc5ec 1,000V~3,000V \uc815\ub3c4\uac00 \ub418\ub3c4\ub85d \ud558\ub294\uac83\uc774 \ubc14\ub78c\uc9c1\ud568.<\/p>\n\n\n\n<p>[Step 09] \ucd5c\ub300 Mesh \uc804\uc555 \uacc4\uc0b0<\/p>\n\n\n\n<p>1) \uc218\uc2dd \uc801\uc6a9<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[E_{mesh}=\\frac{\\rho K_mK_i}{L_m}\\times I_g\\]\n\\[\\rho : \ub300\uc9c0 \uc800\ud56d\ub960 [\\Omega \\cdot m]\\]\\[K_m,K_i:IEEE\\ std. 80\uc5d0 \ub530\ub974\ub294 \uc0c1\uc218\\]\\[L_m:Mash\ub3c4\uccb4\uc758 \uae38\uc774[m]\\]\\[I_g:\uc9c0\ub77d\uc804\ub958[A]\\]<\/div>\n\n\n\n<p>2) \uae30\uc220\uc790\ub8cc \uadf8\ub798\ud504 \uc801\uc6a9<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[E_{mesh}=\\beta\\times GPR\\]<\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"425\" height=\"397\" src=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u11622.png\" alt=\"\" class=\"wp-image-10308\" srcset=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u11622.png 425w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u11622-300x280.png 300w\" sizes=\"(max-width: 425px) 100vw, 425px\" \/><\/figure>\n\n\n\n<p>[Step 10] \ud5c8\uc6a9 \uc811\ucd09\uc811\uc555\uacfc Mesh \uc804\uc555 \ube44\uad50<\/p>\n\n\n\n<p>\ucd5c\ub300 Mesh \uc804\uc555\uc774 \ud5c8\uc6a9 \uc811\ucd09\uc804\uc555\ubcf4\ub2e4 \ub0ae\uc73c\uba74 \uc124\uacc4\uac00 \ub05d\ub09c\ub2e4. \uadf8\ub7ec\ub098 \u201cMesh \uc804\uc555\uff1e\ud5c8\uc6a9 \uc811\ucd09\uc804\uc555\u201d\uc774\uba74 \uc124\uacc4\ub97c \uc218\uc815\ud55c\ub2e4.<\/p>\n\n\n\n<p>[Step 11] \uc7ac\uc124\uacc4<\/p>\n\n\n\n<p>\uc7ac\uc124\uacc4\ub97c \ud55c \ud6c4\uc5d0 Step 5\ubd80\ud130 \ub2e4\uc2dc \uc2dc\uc791\ud55c\ub2e4.<\/p>\n\n\n\n<h3>\u203b \uc7ac\uc124\uacc4\uc2dc \uace0\ub824\uc0ac\ud56d<\/h3>\n\n\n\n<p>\u2460 Grid \uc800\ud56d \uc800\uac10 : \uba74\uc801\ud655\uc7a5, \ub9e4\uc124\uae4a\uc774 \uc870\uc815, \ucd1d \ub9e4\uc124\uae38\uc774 \uc870\uc815<br>\u2461 Grid \uac04\uaca9\uc744 \uac00\uae5d\uac8c \ud55c\ub2e4. Grid\uc758 \uac00\uc7a5\uc790\ub9ac\uc5d0 \uc811\uc9c0\ubd09\uc744 \ucd94\uac00\ub85c \ub54c\ub824 \ubc15\ub294\ub2e4.<br>\u2462 Grid \uc804\ub958\ub97c \ub354 \ub9ce\uc774 \ub2e4\ub978 \ud1b5\ub85c\ub85c \ub3cc\ub9ac\ub294 \ubc29\ubc95<\/p>\n\n\n\n<p>\uacc4\uc0b0\ub41c \uc804\uc704\uc0c1\uc2b9 \ubc0f Mesh \uc804\uc704\uac00 \uc811\ucd09\uc804\uc555\uacfc \ubcf4\ud3ed\uc804\uc555\uc758 \ud5c8\uc6a9 \uac12 \ubcf4\ub2e4 \ub0ae\uc73c\uba74 \uae30\uae30\uc811\uc9c0\ub97c \uc704\ud55c \uc138\ubc00\ud55c \ubd80\ubd84\ub9cc \ubcf4\uc644\ud558\uace0 \uc124\uacc4\ub97c \ub05d\ub0b8\ub2e4. \ub610\ud55c \uc811\uc9c0\ub418\uc5b4\uc57c \ud560 \uae30\uae30 \uac00\uae4c\uc774\uc5d0 \ub9e4\uc124\uc811\uc9c0 \ub3c4\uc120\uc774 \uc5c6\uc744 \uacbd\uc6b0\uc5d0\ub294 \ucd94\uac00\ub85c \uc811\uc9c0\ub3c4\uc120\uc744 \ub9e4\uc124\ud558\uace0 \ud53c\ub8b0\uae30 \ub610\ub294 \ubcc0\uc555\uae30 \uc911\uc131\uc810 \ub4f1\uc5d0\ub294 \uc811\uc9c0\ubd09\uc744 \ucd94\uac00\ub85c \uc124\uce58\ud55c\ub2e4.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<h3>\u203b \uc811\uc9c0\uc124\uacc4 [\uc608]<\/h3>\n\n\n\n<p>\uc811\uc9c0\uac00\ub2a5 \uad6c\uc5ed : A=63 x 84[\u33a1]<br>\ub300\uc9c0\uc800\ud56d\ub960 : \u03c1=400[\u03a9 m]<br>\uc790\uac08\uc758 \uc800\ud56d\ub960 : \u03c1s=2,500[\u03a9 m]<br>\uc790\uac08\uce35\uc758 \ub450\uaed8 : hs=0.1[m]<br>Mesh \uc811\uc9c0\uc804\uadf9\uc758 \ub9e4\uc124\uae4a\uc774 : h=0.5[m]<br>\uc9c0\ub77d\ucc28\ub2e8 \uc2dc\uac04 : ts=0.5[s]<br>\uacc4\ud1b5 \uc784\ud53c\ub358\uc2a4 : Z1=4+j10, Z0=10+j40<br>\ubd84\ub958\uacc4\uc218(Sf)=0.6<br>\uc120\uac04\uc804\uc555=115[kV]<\/p>\n\n\n\n<p>[Step 01] \uc9c0\ub77d\uc804\ub958 \uacc4\uc0b0<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[I_g=3I_0=\\frac{3E}{Z_1+Z_2+Z_0}\\]\\[=\\frac{3\\times 115\/\\sqrt{3}}{2(4+j10)+10+j40}=3,173[A]\\]<\/div>\n\n\n\n<p>[Step 02] \uc811\uc9c0\uc120\uc758 \uad75\uae30 \uacc4\uc0b0<\/p>\n\n\n\n<p>\ub098\uc5f0\ub3d9\uc120 \uc0ac\uc6a9(\uc625\uc678 : \uc8fc\uc704 \uc628\ub3c4 55C\uae30\uc900), \ucc28\ub2e8\uc2dc\uac04 0.5\ucd08 \uc801\uc6a9<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[A=\\frac{\\sqrt{t_s}}{K}=\\frac{\\sqrt{3173^2\\times0.5}}{276}=8.13[mm^2]\\]<\/div>\n\n\n\n<p>[Step 03] \ud5c8\uc6a9\uc811\ucd09\uc804\uc555 \ubc0f \ubcf4\ud3ed\uc804\uc555\uc758 \uacc4\uc0b0<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\ubc18\uc0ac\uacc4\uc218(K)=\\frac{\\rho-\\rho_s}{\\rho+\\rho_s}=\\frac{400-2500}{400+2500}=-0.72\\]\n\\[\\rho : \ud1a0\uc591\uc758\\ \uace0\uc720\uc800\ud56d, \\rho_s:\ud45c\uba74\uce35\uc758\\ \uace0\uc720\uc800\ud56d\\]\n\\[\uac10\uc18c\uacc4\uc218(C_s):\ud45c\uba74\uce35\uc758\\ \ub450\uaed8\uc640\\ \ubc18\uc0ac\uacc4\uc218\uc5d0\\ \uc758\ud574\\ \uacb0\uc815\ub418\ub294\\ \uac10\uc18c\uacc4\uc218\\]<\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"362\" height=\"290\" src=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u1162-1.png\" alt=\"\" class=\"wp-image-10309\" srcset=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u1162-1.png 362w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u1100\u1175\u1109\u116e\u11af\u110c\u1161\u1105\u116d-\u1100\u1173\u1105\u1162-1-300x240.png 300w\" sizes=\"(max-width: 362px) 100vw, 362px\" \/><\/figure>\n\n\n\n<p>\ud5c8\uc6a9 \uc811\ucd09\uc804\uc555, \ubcf4\ud3ed\uc804\uc555(70Kg)<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[E_{step}=(1000+6C_s\\cdot \\rho_s)\\times\\frac{0.157}{\\sqrt{t}}=2,320[V]\\]<\/div>\n\n\n\n<p>[Step 04] \uc608\ube44\uc124\uacc4<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"338\" height=\"307\" src=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u110b\u1168\u1107\u1175\u1109\u1165\u11af\u1100\u1168.png\" alt=\"\" class=\"wp-image-10310\" srcset=\"http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u110b\u1168\u1107\u1175\u1109\u1165\u11af\u1100\u1168.png 338w, http:\/\/ftz.myds.me\/wordpress\/wp-content\/uploads\/2022\/07\/\u110b\u1168\u1107\u1175\u1109\u1165\u11af\u1100\u1168-300x272.png 300w\" sizes=\"(max-width: 338px) 100vw, 338px\" \/><\/figure>\n\n\n\n<p>\u2460 Mwsh\uba74\uc801 : 70[m]*70[m]\ub85c \uc120\uc815<br>\u2461 \ub3c4\uccb4\uac00\uaca9 : 7[m]\ub85c \uc120\uc815<br>\u2462 1\ubcc0\uc758Mesh\uc218 : 10<br>\u2463 Mesh \ub3c4\uccb4\uc758 \uae38\uc774 =70*11*2=1,540[m]<br>\u2464 \ub9e4\uc124\uae4a\uc774 : 0.5[m]<\/p>\n\n\n\n<p>[Step 05] \uc811\uc9c0\uc800\ud56d\uc758 \uc0b0\uc815<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/ftz.kr\/wp-content\/uploads\/2021\/02\/\ucea1\ucc98-297.png\" alt=\"\" class=\"wp-image-4894\"\/><\/figure>\n\n\n\n<p>\u2460\uae30\uc220\uc790\ub8cc \uadf8\ub798\ud504<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[R_g=\\frac{\\rho\\times\\alpha}{1,000}=\\frac{400\\times 6.7}{1,000}=2.68[\\Omega]\\]<\/div>\n\n\n\n<p>\u2461\uacc4\uc0b0\uc2dd<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[R_g=\\rho[\\frac{1}{L}+\\frac{1}{\\sqrt{20A}}(1+\\frac{1}{1+h\\sqrt{20\/A}})=2.78[\\Omega]\\]<\/div>\n\n\n\n<p>[Step 06] GPR \uacc4\uc0b0<\/p>\n\n\n\n<p>\u2460\uc811\uc9c0\uadf9 \uc720\uc785\uc804\ub958<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[I&#8217;_g=I_g\\times S_f\\times D_f=3,173\\times 0.6\\times 1=1,903[A]\\]<\/div>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[\u2461GPR=I&#8217;_g\\times R_g=1,903\\times 2.78=5,293[V]\\]<\/div>\n\n\n\n<p>[Step 07] Mesh \uc804\uc555 \uacc4\uc0b0<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/ftz.kr\/wp-content\/uploads\/2021\/02\/noname01-207.png\" alt=\"\" class=\"wp-image-4896\"\/><\/figure>\n\n\n\n<p>\u2460\uae30\uc220\uc790\ub8cc \uadf8\ub798\ud504<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[E_m=GPR\\times\\beta=5,293\\times0.2=1,058[V](\uace1\uc120\uc0c1 20\\%)\\]<\/div>\n\n\n\n<p>\u2461\uacc4\uc0b0\uc2dd : \uc0dd\ub7b5<\/p>\n\n\n\n<p>[Step 08]<\/p>\n\n\n\n<p>Mesh \uc804\uc555\uc774 \ud5c8\uc6a9 \uc811\ucd09\uc804\uc555\ubcf4\ub2e4 \ud06c\ubbc0\ub85c Step 4(\uc608\ube44\uc124\uacc4)\ubd80\ud130 \uc7ac\uac80\ud1a0<\/p>\n\n\n\n<div class=\"wp-block-mathml-mathmlblock\">\\[E\\lt E_m=1,058[V]\\]<\/div>\n\n\n\n<h6><strong><em>\u2605<a href=\"http:\/\/ftz.myds.me\/wordpress\/p-%ec%a0%91%ec%a7%80\/\">\uc811\uc9c0<\/a> <br><a href=\"http:\/\/ftz.myds.me\/wordpress\/%ec%a0%91%ec%a7%80%ec%9d%98-%eb%aa%a9%ec%a0%81\/\">\uc811\uc9c0\uc758 \ubaa9\uc801<\/a>\u2055<br><a href=\"http:\/\/ftz.myds.me\/wordpress\/%ec%a0%91%ec%b4%89%ec%a0%84%ec%95%95%ea%b3%bc-%eb%b3%b4%ed%8f%ad%ec%a0%84%ec%95%95-2\/\">\uc811\ucd09\uc804\uc555\uacfc \ubcf4\ud3ed\uc804\uc555\u2055<br><\/a><a href=\"http:\/\/ftz.myds.me\/wordpress\/%eb%93%b1%ec%a0%84%ec%9c%84-%eb%b3%b8%eb%94%a9-2\/\">\ub4f1\uc804\uc704 \ubcf8\ub529\u2055<br><\/a><a href=\"http:\/\/ftz.myds.me\/wordpress\/%eb%8f%85%eb%a6%bd%ec%a0%91%ec%a7%80%ec%99%80-%ea%b3%b5%ec%9a%a9-%ed%86%b5%ed%95%a9%ec%a0%91%ec%a7%80-%ec%8b%9c%ec%8a%a4%ed%85%9c\/\">\ub3c5\ub9bd\uc811\uc9c0\uc640 \uacf5\uc6a9\/\ud1b5\ud569\uc811\uc9c0 \uc2dc\uc2a4\ud15c\u2055<br><\/a><a href=\"http:\/\/ftz.myds.me\/wordpress\/ks-c-iec-%ec%a0%91%ec%a7%80%eb%b0%a9%ec%8b%9d\/\">KS C IEC \uc811\uc9c0\ubc29\uc2dd\u2055<br><\/a><a href=\"http:\/\/ftz.myds.me\/wordpress\/%ec%a0%91%ec%a7%80%ec%84%a0-%eb%b0%8f-%eb%b3%b4%ed%98%b8%eb%8f%84%ec%b2%b4-%ea%b5%b5%ea%b8%b0-%ec%84%a0%ec%a0%95\/\">\uc811\uc9c0\uc120 \ubc0f \ubcf4\ud638\ub3c4\uccb4 \uad75\uae30 \uc120\uc815\u2055<br><\/a><a href=\"http:\/\/ftz.myds.me\/wordpress\/%eb%8c%80%ec%a7%80%ec%a0%80%ed%95%ad%eb%a5%a0%ea%b3%bc-%ec%a0%91%ec%a7%80%ec%a0%80%ed%95%ad-%ec%b8%a1%ec%a0%95\/\">\ub300\uc9c0\uc800\ud56d\ub960\uacfc \uc811\uc9c0\uc800\ud56d \uce21\uc815<\/a>\u2055<br><a href=\"http:\/\/ftz.myds.me\/wordpress\/%eb%b3%80%ec%a0%84%ec%86%8c-%ec%a0%91%ec%a7%80%ec%84%a4%ea%b3%84\/\">\ubcc0\uc804\uc18c \uc811\uc9c0\uc124\uacc4<\/a>\u2055<br><a href=\"http:\/\/ftz.myds.me\/wordpress\/%ec%a4%91%ec%84%b1%ec%a0%90-%ec%a0%91%ec%a7%80%eb%b0%a9%ec%8b%9d-2\/\">\uc911\uc131\uc810 \uc811\uc9c0\ubc29\uc2dd<\/a><\/em><\/strong> \u2055<\/h6>\n\n\n\n<p><meta charset=\"utf-8\"> \u2605<strong><a href=\"https:\/\/cq4l.com\/am-%EC%A0%91%EC%A7%80-%EC%84%A4%EA%B3%84\/\">\uc811\uc9c0 \uc124\uacc4<\/a><\/strong>\u00a0(EP)<br><a rel=\"noopener\" href=\"http:\/\/ftz.myds.me\/wordpress\/%ec%a0%91%ec%a7%80%ec%9d%98-%eb%aa%a9%ec%a0%81%ea%b3%bc-%ec%a2%85%eb%a5%98\/\" target=\"_blank\"> <\/a>E\u00a0<a href=\"https:\/\/cq4l.com\/%ec%a0%91%ec%a7%80%ec%9d%98-%eb%aa%a9%ec%a0%81%ea%b3%bc-%ec%a2%85%eb%a5%98\/\">\uc811\uc9c0<\/a><br>O\u00a0<a href=\"https:\/\/cq4l.com\/ieee-std-80%ec%a0%91%ec%a7%80%ec%84%a4%ea%b3%84-%ea%b0%9c%eb%85%90\/\">\uc811\uc9c0\uc124\uacc4<\/a><br>N\u00a0<a href=\"https:\/\/cq4l.com\/an-%ed%86%a0%ec%96%91%ed%8a%b9%ec%84%b1-%ea%b2%80%ed%86%a0\/\">\ud1a0\uc591\ud2b9\uc131 \uac80\ud1a0<\/a><a href=\"https:\/\/cq4l.com\/%eb%8c%80%ec%a7%80%ec%a0%80%ed%95%ad-%ec%b8%a1%ec%a0%95%eb%b2%95\/\"><br><\/a>R\u00a0<a href=\"https:\/\/cq4l.com\/%EB%8C%80%EC%A7%80%EA%B5%AC%EC%A1%B0-%ED%95%B4%EC%84%9D%EB%B0%A9%EB%B2%95\/\">\ub300\uc9c0\uad6c\uc870 \ud574\uc11d\ubc29\ubc95<\/a><br>D\u00a0<a href=\"https:\/\/cq4l.com\/%ec%a0%91%ec%a7%80%ec%a0%80%ed%95%ad-%ec%a0%80%ea%b0%90%eb%b2%95\/\">\uc811\uc9c0\uc800\ud56d \uc800\uac10<\/a><br>B\u00a0<a href=\"https:\/\/cq4l.com\/%eb%b3%b4%eb%a7%81%ea%b3%b5%eb%b2%95\/\">\ubcf4\ub9c1\uacf5\ubc95(\uc218\uc9c1\uacf5\ubc95)<\/a><br>P\u00a0<a href=\"https:\/\/cq4l.com\/pgs%ea%b3%b5%eb%b2%95\/\">PGS\uacf5\ubc95<\/a><br>C\u00a0<a href=\"https:\/\/cq4l.com\/%ec%a0%91%ec%a7%80%ec%a0%80%ed%95%ad-%ec%b8%a1%ec%a0%95%eb%b2%95\/\">\uc811\uc9c0\uc800\ud56d\uce21\uc815\ubc95<\/a><br>6\u00a0<a href=\"https:\/\/cq4l.com\/61-8%EB%B2%95%EC%B9%99\/\">61.8%\ubc95\uce59<\/a><br><a href=\"https:\/\/cq4l.com\/kec140\/\">KEC140<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>IEC \uc811\ube44\uc124\uacc4\u2736 \ubcc0\uc804\uc18c \uc811\uc9c0\uc124\uacc4(ANSI\/IEEE std. 80) ANSI\/IEEE std.80\uc5d0 \uc758\ud55c \uc811\uc9c0\uc124\uacc4 \ud750\ub984\ub3c4\ub97c \uc81c\uc2dc\ud558\uace0 \uc124\uba85\ud558\uc2dc\uc624. [Step 01] \ud1a0\uc591\uc758 \ud2b9\uc131 \ubd84\uc11d(\ud1a0\uc591\uc758 \uc800\ud56d\ub960 \ud3c9\uac00, \uc9c0\uce35\uad6c\uc870 \ub4f1 \ud655\uc778)\ub4f1 \ud604\uc7a5\uc870\uc0ac [Step 02] \ucd5c\ub300 \uc9c0\ub77d\uc804\ub958(\ube44\ub300\uce6d \uc804\ub958 \ud3ec\ud568) \uacc4\uc0b0 [Step 03] \uc811\uc9c0\ub3c4\uccb4 \uad75\uae30 \uc120\uc815 [Step 04] \ud5c8\uc6a9 \uc811\ucd09\uc804\uc555 \ubc0f \ubcf4\ud3ed\uc804\uc555 \uacc4\uc0b0(70Kg) [Step 05] \uc608\ube44\uc124\uacc4 \uc2e4\uc2dc Mesh \uc811\uc9c0\ud560 \uba74\uc801\uc744 \uace0\ub824\ud558\uc5ec, Mesh\uc758 \uac04\uaca9 \ubc0f 1\ubcc0 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[510],"tags":[],"_links":{"self":[{"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/posts\/6121"}],"collection":[{"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/comments?post=6121"}],"version-history":[{"count":0,"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/posts\/6121\/revisions"}],"wp:attachment":[{"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/media?parent=6121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/categories?post=6121"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ftz.myds.me\/wordpress\/wp-json\/wp\/v2\/tags?post=6121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}